Schwalbe Rocket Ron 20 x 2.25" Addix Speed Folding Bike Tyre - Evo / LiteSkinSchwalbe Rocket Ron 20 x 2. 25" Addix Speed Folding Bike Tyre Evo LiteSkin The cross country rocket combines speed and cornering control at the highest possible level. An excellent all rounder for racetracks. ADDIX SPEED: the compound for XC race specialists. It catapults our XC tyres into a new performance dimension. It is the answer for those whod like to go even faster. Theres only one thing that ADDIX Speed really loves and thats speed. So the